normalize: extend xorg blacklist

Closes rhbz#1068767.

Signed-off-by: Martin Milata <mmilata@redhat.com>
Merge pull request #157 from abrt/rhbz1068767

normalize: extend xorg blacklist

Closes rhbz#1068767.

Signed-off-by: Martin Milata <mmilata@redhat.com>